<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        var str = '' ;
        var rows = 9;
        var cols = 9;
        for (i = 1;i <= rows;i++) {
            for (j =1;j <= i;j++) {
                str = str + j +'*'+ i+'='+ i*j+'\t'
            }
            str = str + '\n'
        }
        console.log(str);
        
    </script>
</head>
<body>
    
</body>
</html>